It centers around the travails and battles of one Ushio Aotsuki (??? Aotsuki Ushio), who is constantly being stalked and aided by a gigantic, supernatural and sometimes invisible tiger (Some people describe it as akin to Calvin and Hobbes on acid, but I disagree).
Ushio's family maintains a Buddhist temple in Japan, where ~500 years ago, his samurai ancestor battled that same tiger to a standst...

Naruse Kazuki and Koutake Haruki are on the advanced track of Seitoukou Academy. Though they are not connected by blood, these two whose faces are so similar coincidentally have their 16th birthdays on November 11th. However, on that fateful anniversary, the cogs of fate have begun to turn. A game involving both their destinies has now begun!
-Please note the first set of chapters have been del...

From Aerandria Scans:
During the age of romanticism in Japan, the capital was leveled to the ground by a powerful earthquake. One of the many orphans it left was Sorato, who was taken in by Baron Kamichika. In his new home, the “Blood Blossom” Estate, Sorato meets the baron’s heir, Garan, and his fiancee, Kiyora, and the three swear their eternal friendship. But that promise is soon showered in...

The story takes place in the same official Code Geass history as the anime, but in a different era. The title character, Renya, is a 17-year-old boy with a mechanical left arm and shuriken throwing stars as his weapons of choice. The story begins when Renya encounters a mysterious, perpetually young witch named "Reif? C.C." C.C. has appeared in Japan's historical Edo era to seek a new pa...

There's a vicious struggle raging in the heart of the Orthodox Church. Athos and Adept, two ancient factions, are locked in a conflict that has lasted for thousands of years. To them, nothing is forbidden and everything is a weapon to be used in their fight for the Circuits, from faith and politics to mercenary death squads and even the feared Qwasers, powerful fanatics that take holy breast milk ...

Marie is trapped in a horrible situation. She's being constantly tormented by her classmates and regularly molested by her teacher. With nowhere else to turn, she finds herself asking for supernatural help from one of the seven demons of the seven mysteries of her school. All she desires is the death of her cruel classmates and teacher. How far will Marie be willing to go in order to achieve the m...

From: Easy Going Scans
Look for him in the boulevard full of sorrow and desires called Slum Street and there is where you shall find the Necromancer. He has the power and knowledge to resurrect all your loved ones and the only thing you have to do is make a contract with him while you’ll find yourself being swiped away by a tale of life and death.

From Tokyopop:
Mayu, the daughter of a café owner, is unlucky in love until she meets “Puchou,” the magical fairy of beverages. Now, whenever Mayu drinks something, she transforms accordingly! Milk makes her grow large, water makes her invisible, pork soup turns her into a cute little piglet. But what will help her win the man of her dreams?

From Shinnen"
Naraka High School, is a seemingly normal school. However, unknown to the public is the cruel truth of what really goes on in the school's halls. Rather than studying, students are forced to struggle for their very survival. And the strong bonds of friendship may be the only difference between life and death.

From September Scanlations:
Misono Kazuki is a college student pursuing a dream of becoming a famous novelist—but unfortunately, for someone trying to pen a supernatural YA novel, he’s got next to no experience with close encounters of the spiritual kind. To remedy this, at the suggestion of a friend, he heads to a supposedly haunted shrine late one moonlit evening, and while he doesn’t find an...

In the morning of his first day of work, novice teacher Tada Haruyuki got into trouble with the principal... and he got fired immediately! On the day that he was finally appointed to another position, he encounters a little boy with round eyes on a snowy mountain road. The little boy shows him the way to his new school, but no matter how he looks at it, the school seems weird?! What exactly is wai...

His name is Kuruto Kagemitsu -- a cute boy with a vengeance. The demon's name is Shuma. He was summoned, much to his surprise and likely chagrin, by that cute boy, and forced to be his servant. Their goal, one intrinsic and the other quite extrinsic, is to eliminate 71 of 72 of King Solomon's demons -- Shuma being the sole exception for obvious reasons -- who are supposedly controlled by one summo...

The manga is composed of various episodes linked together by the mysterious boy with no particular name. The boy travels to different times and places, trading with different people, letting them see a glimpse of their future or past, or the secrets of others, and bets to see if they can change their fate.

In ancient times, the Titan Cronus (son of Uranus the sky and Gaia the earth) and his wife Rhea gave birth to six children. Five of them were swallowed by Cronus, and only one was saved, Zeus, hidden from Cronus by Rhea. Upon reaching adulthood, Zeus forced his father to vomit the other five gods. Zeus, along with his brothers and sisters, decided to battle the Titans for control of the universe. ...

/ from the A-Team /
Eraser, the mysterious enemy that invaded Earth 13 years ago!! Before their overwhelming power, the entire Earth neared the verge of collapse. But at the last moment there suddenly appeared Earth's lone savior, The Beast: an ultimate weapon uniquely equipped to counter the Eraser's power!! The Beast is part of the MAGIC Brigade, whose commander-in-chief is also the founder o...

From Evil Flowers:
They say the world is going to end in five days. Now what to do until then? Follow Fuji, Touko and Nitaka on their last school days preparing for the end of the world. Meanwhile, Niino, a clumsy devil, announces that she’s going to destroy the world in five days from now. The hilarious chaos is complete now.

From FoOlRulez:
Hiraga Saito was summoned to the wonderful world of Halkeginia through the use of magic. He was summoned by the very cute, yet with "Zero" magical ability, Louise. Although it was an accident, Saito was summoned during the summoning ceremony, and sealed the agreement to become Louise's "Familiar" through a kiss. That is how he arrived in this world.
While on...

With the destiny of searching for a bride, the youkai teenage boy came to Tokyo from a small island: Hanzou. A maiden who develops a youkai-atracting constitution at 16: Ichijouji Mei. With the youkai's heaven "Tokyo" as its stage, Girl-Meets-Monster love comedy.

From Chibi Manga:
During the prefecture tournament competition, in the midst of the cheering in the gymnasium, the scream of Aoba who collapsed echoed through it. Aoba, who was terribly injured who only lived life as an athlete went into despair. In the midst of that, a classmate, Gin, who is a little strange, nominated Aoba as a volleyball member for the ball tournament. “I want to play with y...

Meet Kazahaya and Rikuo. By day, they are two ordinary workers at the Green Drug pharmacy; by night, their boss has them filling 'special prescriptions' for clients with ailments that can't be cured using ordinary elixirs. Note: The original series went on hiatus for many years, and has only recently been picked up again. The continuation is "Drug and Drop" and picks up where the origina...